Enabling AVB on Cisco Catalyst Switches
This article describes how to enable AVB on supported Cisco® Cataylst® switches. This article does not detail Cisco firmware upgrade or initial switch setup procedure. Please see Cisco Catalyst documentation for more detail. Biamp recommends a Cisco certified technician performs switch configuration.
Supported Catalyst models
AVB is supported on select models of the following Catalyst series.
| Catalyst 3650 Series | Catalyst 3850 Series |
|---|---|
| Required license level: ipbase or ipsevices |
Required license level: ipbase or ipsevices |
|
Minimum IOS release: Cisco recommends: IOS XE Gibraltar 16.12.4 |
Minimum IOS release: Cisco recommends: IOS XE Gibraltar 16.12.4 |
| C3650-24PDM C3650-48FQM C3650-8X24PD C3650-8X24UQ C3650-12X48FD C3650-12X48UQ C3650-12X48UR C3650-12X48UZ |
C3850-12X48U C3850-24XU C3850-12XS C3850-16XS C3850-24XS C3850-32XS C3850-48XS |
Note: The Catalyst 9300 series and Catalyst 9500 series are pending Avnu certification.
Catalyst 3650 and 3850 series switches have been certified by the Avnu Alliance, and are recommended for use with AVB. Avnu certification has not yet been obtained for the Catalyst 9300 and Catalyst 9500 series.
The following Cisco license levels are required for AVB support.
- ipbase or ipservices license level for Catalyst 3000 family.
- Network Advantage for Catalyst 9000 family.
- DNA Subscription license not required for AVB support.
Cisco recommends the following Cisco IOS® XE Software release versions are required for AVB support.
- IOS XE Gibraltar-16.12.4 for Catalyst 3000 family.
Limitations
Cisco Catalyst IOS applies following limitations apply when AVB is enabled:
- AVB is not supported on StackWise connected switches. Fiber and copper uplinks are supported.
- AVB is not supported on ports that are combined using link aggregation (EtherChannel).
- Up to 200 streams are supported per switch.
Enabling AVB
Prerequisites:
- Cisco IOS XE Software with AVB support.
- Switches have appropriate license levels.
- User has access to CLI with configure permissions.
- Switches are not in stacking mode
- Interfaces are not configured for Etherchannel
- Default VLAN 1 must be enabled on AVB ports
Step 1 - Enable AVB feature
Enter the following commands to enable AVB and MVRP (automatic VLAN) on the switch.
| Command | Note |
|---|---|
| Switch> enable | Enable EXEC mode. |
| Switch# configure terminal | Enter global configuration mode. |
| Switch(config)# avb vlan 2 | Enable AVB vlan 2 |
| Switch(config)# avb | Enable AVB. |
| Switch(config)# mvrp global | Enter MVPR global configuration. |
| Switch(config)# vtp mode off | VLAN Trunking Protocol (VTP) can be configured for off or transparent mode operation. |
| Switch(config)# mvrp vlan create | Enable MVRP to create VLANs |
| Switch(config)# avb msrp-join-timer 200 | Set MSRP join timer to expected value |
| Switch(config)# avb msrp-leave-timer 1200 | Set MSRP leave timer to expected value |
| Switch(config)# avb msrp-leaveall-timer 25000 | Set MSRP leave-all timer to expected value |
| Switch(config)# qos queue-softmax-multiplier 1200 | Increase this buffer requested by Cisco |
| Switch(config)# end | End global configuration mode and return to EXEC mode. |
| Switch# write memory | Save the switch configuration. |
Automatic VLAN creation may not be preferred some environments. In these cases, VLAN 2 can be configured manually and MVRP not utilized. For further details, see the Cisco IOS XE command reference guide for configuring Audio Video Bridging.
Step 2 - Configure interfaces with AVB connections to VLAN trunk mode.
Any ports with AVB devices attached must be configured for VLAN trunking mode. The port must also not be administratively shutdown. The following commands show enabling trunk mode for interface GigabitEthernet1/0/1.
| Command | Note |
|---|---|
| Switch> enable | Enable EXEC mode. |
| Switch# configure terminal | Enter global configuration mode. |
| Switch(config)# interface GigabitEthernet1/0/1 | Enter interface configuration mode. |
| Switch(config-if)# switchport mode trunk | Configure VLAN mode to trunk. |
| Switch(config-if)# spanning-tree portfast trunk | Interface moves directly to spanning-tree forwarding state |
| Switch(config-if)# no shutdown | Ensure the port is not administratively shut down. |
| Switch(config-if)# end | End configuration mode and return to EXEC mode. |
| Switch# write memory | Save switch configuration to memory. |
Configuring port by port is time consuming. The following is an example for configuring all ports 1-36 using the interface range command:
Switch>enable
Switch#configure terminal
Switch(config)#interface range GigabitEthernet1/0/1 - 36
Switch(config-if-range)#switchport mode trunk
Switch(config-if-range)#spanning-tree portfast trunk
Switch(config-if-range)#no shutdown
Switch(config-if-range)#end
Switch#write memory
Switch#exit
Step 3 - Optional Configuration of interfaces connecting to devices requiring class 4 (POE+ and PPoE).
Biamp class 4 devices will require additional 2-event classification commands to negotiate with Cisco Power Sourcing Equipment (PSE).
Cisco indicates 2-event classification allows class 4 Powered devices (PDs) to detect a PSE capability of providing 30W from hardware then register itself moving upward to PoE+ level without waiting for any CDP/LLDP packet exchange.
After 2-event is enabled on a port, you must manually shut/un-shut the port or re-connect the PD again to re-start the IEEE detection process.
Note that power budget allocation for a class-4 device will be 30W when 2-event classification is enabled on the port otherwise it will be 15.4W.
The following is an example for configuring all ports 1-36 using the interface range command, 2-event POE configuration with additional easy to identify interface description of BIAMP on the ports:
Switch>enable
Switch#configure terminal
Switch(config)#interface range GigabitEthernet1/0/1 - 36
Switch(config)#description BIAMP
Switch(config-if-range)#power inline port 2-event
Switch(config-if-range)#shutdown
Switch(config-if-range)#no shutdown
Switch(config-if-range)#end
Switch#write memory
Switch#exit
The switch does not require a reboot. Connected AVB enabled end points will begin transmitting protocol messages within moments of configuring the switch. Many other specific configuration options are available for the AVB protocols. Please see the IOS XE command reference guides for further details.
AVB status and monitoring commands
The following commands are used to view the status of AVB on the switch and for assisting with diagnosing issues.
| Command | Note |
|---|---|
| show msrp stream | count : | Shows the total amount of AVB streams. |
| show avb domain | Shows a high level overview of AVB operation on the switch. Displays stream reservation domain active ports, gPTP neighbor delay and VLAN membership. |
| show avb stream | Displays a high level overview of all AVB streams advertised on the network. |
| show msrp streams brief | Provides a brief view of AVB streams on the network. |
| show msrp streams detail | Provides a detailed output of AVB streams and reservations on the network. |
| show msrp port bandwidth | Shows current stream reservation consumption on the switch ports. |
| show mvrp summary | Shows a summary of VLANs created automatically. |
| show mvrp interface | Displays interface specific MVRP details. |
| show ptp brief | Shows a brief overview of gPTP operation. |
| show ptp clock | Shows the current clock details. |
| show ptp parent | Shows details of the parent clock. |
| show platform software fed switch active ptp if-id {interface-id} | Detailed output of the gPTP operation of a port. Provides neighbor delay threshold and current measured neighbor delay. |
| show version | Shows details of the switch's software version. See Enabling AVB on Cisco Catalyst Switches |
| show license right-to-use | Shows details of the switch's enabled licenses. See Enabling AVB on Cisco Catalyst Switches |
Further reading
- Cisco Audio Video Bridging Configuration Guide, Cisco IOS XE Gibraltar 16.12.x (Catalyst 3850 Switches)
- Release Notes for Cisco Catalyst 3850 Series Switches, Cisco IOS XE Gibraltar 16.12.x
- Cisco Audio Video Bridging Configuration Guide, Cisco IOS XE Gibraltar 16.12.x (Catalyst 3650 Switches)
- Release Notes for Cisco Catalyst 3650 Series Switches, Cisco IOS XE Gibraltar 16.12.x
- List of AVB-capable Ethernet switches
- Cisco.com AVB website
- Configuring 2-event (PoE+) Classification
- Extensive PoE Configuration details - C3850
- "POE in depth" Biamp Cornerstone